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Table 1 Clavien-Dindo classification of morbidity for complication

From: The impacts of different embolization techniques on splenic artery embolization for blunt splenic injury: a systematic review and meta-analysis

Grade I Any deviation from the normal postoperative course without the need for pharmacological treatment or surgical, endoscopic and radiological interventions
Allowed therapeutic regimens are: drugs as antiemetics, antipyretics, analgesics, diuretics and electrolytes and physiotherapy. This grade also includes wound infections opened at the bedside
Grade II Requiring pharmacological treatment with drugs other than those allowed for grade I complications
Blood transfusions and TPN1 are also included
Grade III Requiring surgical, endoscopic or radiological intervention
 IIIa Intervention not under general anesthesia
 IIIb Intervention under general anesthesia
Grade IV Life-threatening complication (including CNS complications) or requiring IC/ICU-management
 IVa Single organ dysfunction (including dialysis)
 IVb Multi-organ dysfunction
Grade V Death